Results 11 to 20 of about 983,317 (272)

Binding of caffeine with nicotinamide: A study by means of fluorescence quenching and UV-Vis spectroscopic techniques

open access: yesSt. Petersburg Polytechnical University Journal: Physics and Mathematics, 2023
In this work, the binding of caffeine (CAF) with nicotinamide (NIC) has been investigated by means of fluorescence quenching and UV-Vis spectroscopic techniques.
Gebreyohanes Ataklti Abraha   +1 more
doaj   +1 more source

Nonphotochemical Chlorophyll Fluorescence Quenching: Mechanism and Effectiveness in Protecting Plants from Photodamage1

open access: yesPlant Physiology, 2016
Knowledge about the mechanism of non-photochemical chlorophyll fluorescence quenching adds to an understanding of its effectiveness at protecting plants from photodamage.
A. Ruban
semanticscholar   +1 more source

Promoting near‐infrared II fluorescence efficiency by blocking long‐range energy migration

open access: yesAggregate, 2023
Generally, long wavelength absorbed near‐infrared II (NIR‐II) dyes have a low fluorescence efficiency in aggregate states for aggregate‐caused quenching effect, simultaneously enhancing efficiency and extending absorption is a challenging issue for NIR ...
Changjin Ou   +9 more
doaj   +1 more source

Empirical equation for the correction of fluorescence quenching of proteinaceous substance by Suwannee river natural organic matter

open access: yesWater Practice and Technology, 2021
Fluorescence quenching of proteinaceous substances by natural organic matter is a well-known phenomenon, but there are no known methods for correcting it.
Kornravee Saipetch   +2 more
doaj   +1 more source

Fluorescence quenching in graphene: a fundamental ruler and evidence for transverse plasmons [PDF]

open access: yesPhys. Rev. B 84, 165438 (2011), 2011
Graphene's fluorescence quenching is studied as a function of distance. Transverse decay channels, full retardation and graphene-field coupling to all orders are included, extending previous instantaneous results. For neutral graphene, a virtually exact analytical expression for the fluorescence yield is derived, valid for arbitrary distances and only ...
arxiv   +1 more source

INVESTIGAÇÃO DA SUPRESSÃO DE FLUORESCÊNCIA DE SORO ALBUMINA BOVINA E HUMANA POR COMPLEXO DE RUTÊNIO

open access: yesQuímica Nova, 2015
The binding of [RuCl2(L)] (L = N,N-bis(7-methyl-2-pyridylmethylene)-1,3-diiminopropane) to bovine and human serum albumin was investigated by the fluorescence quenching technique.
Mariete B. Moreira   +5 more
doaj   +1 more source

Unified evaluation of surface-enhanced resonance Raman scattering and fluorescence under strong coupling regime [PDF]

open access: yesThe Journal of chemical physics 149 (24), 244701 (2018), 2018
We demonstrate importance of molecular multiple excitons and higher-order plasmons for both enhancement and quenching of resonance Raman and fluorescence of single dye molecule located at plasmonic hotspot under strong coupling regime. The multiple excitons induce complicated spectral changes in plasmon resonance and higher-order plasmons yield drastic
arxiv   +1 more source

Anomalous fluorescence enhancement and fluorescence quenching of graphene quantum dots by single walled carbon nanotubes.

open access: yesPhysical Chemistry, Chemical Physics - PCCP, 2018
We explore the mechanism of the fluorescence enhancement and fluorescence quenching effect of single walled carbon nanotubes (SWCNTs) on highly fluorescent graphene quantum dots (GQDs) over a wide range of concentrations of SWCNTs.
R. Das, Gone Rajender, P. Giri
semanticscholar   +1 more source

Fluorescence quenching of naphthols by Cu2+ in micelles

open access: yesArabian Journal of Chemistry, 2014
Effect of the micelles of anionic, cationic and non-ionic surfactants on the fluorescence quenching of 1- and 2-naphthols has been studied in the presence of copper ion. The excited state lifetime, dynamic and static quenching constants for these systems
Manorama Panda, Kabir-ud-Din
doaj   +1 more source

Fluorescence of Alexa fluor dye tracks protein folding. [PDF]

open access: yesPLoS ONE, 2012
Fluorescence spectroscopy is an important tool for the characterization of protein folding. Often, a protein is labeled with appropriate fluorescent donor and acceptor probes and folding-induced changes in Förster Resonance Energy Transfer (FRET) are ...
Simon Lindhoud   +4 more
doaj   +1 more source

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